A Study of Tucatinib vs. Placebo in Combination With Capecitabine & Trastuzumab in Patients With Advanced HER2+ Breast Cancer

Summary

This study is being done to see if tucatinib works better than placebo to help patients who have a specific type of breast cancer called HER2 positive breast carcinoma. The breast cancer in this study is either metastatic (spread into other parts of the body) or cannot be removed completely with surgery. All patients in the study will get capecitabine and trastuzumab, two drugs that are often used to treat this cancer. There are two parts to this study. The first part of the study is already complete. Patients were randomly assigned to get either tucatinib or placebo (a pill with no medicine). Since this part was "blinded," neither patients nor their doctors knew whether a patient got tucatinib or placebo. The second part of the study is called the Unblinded Phase. In this part of the study, participants and their doctors know which drugs are being given. Participants who used to get or are currently getting placebo may be able to start taking tucatinib instead. Each treatment cycle lasts 21 days. Patients will swallow tucatinib pills two times every day. They will swallow capecitabine pills two times a day during the first two weeks of each cycle. Patients will get trastuzumab injections from the study site staff on the first day of every cycle.

Timeline

Start

2016-01-28

Primary completion

2019-09-04

Completion

2022-08-11

Publications

• Dai L, Gao T, Guo R, Chen Y, Wang J, Zhou S, Tang Y, Chen D, Huang S. Efficacy and safety of pyrotinib-based regimens in HER2 positive metastatic breast cancer: A retrospective real-world data study. Neoplasia. 2024 Oct;56:101029. doi: 10.1016/j.neo.2024.101029. Epub 2024 Jul 17.
• Lin NU, Murthy RK, Abramson V, Anders C, Bachelot T, Bedard PL, Borges V, Cameron D, Carey LA, Chien AJ, Curigliano G, DiGiovanna MP, Gelmon K, Hortobagyi G, Hurvitz SA, Krop I, Loi S, Loibl S, Mueller V, Oliveira M, Paplomata E, Pegram M, Slamon D, Zelnak A, Ramos J, Feng W, Winer E. Tucatinib vs Placebo, Both in Combination With Trastuzumab and Capecitabine, for Previously Treated ERBB2 (HER2)-Positive Metastatic Breast Cancer in Patients With Brain Metastases: Updated Exploratory Analysis of the HER2CLIMB Randomized Clinical Trial. JAMA Oncol. 2023 Feb 1;9(2):197-205. doi: 10.1001/jamaoncol.2022.5610.
• Mueller V, Wardley A, Paplomata E, Hamilton E, Zelnak A, Fehrenbacher L, Jakobsen E, Curtit E, Boyle F, Harder Brix E, Brenner A, Crouzet L, Ferrario C, Munoz-Mateu M, Arkenau HT, Iqbal N, Aithal S, Block M, Cold S, Cancel M, Hahn O, Poosarla T, Stringer-Reasor E, Colleoni M, Cameron D, Curigliano G, Siadak M, DeBusk K, Ramos J, Feng W, Gelmon K. Preservation of quality of life in patients with human epidermal growth factor receptor 2-positive metastatic breast cancer treated with tucatinib or placebo when added to trastuzumab and capecitabine (HER2CLIMB trial). Eur J Cancer. 2021 Aug;153:223-233. doi: 10.1016/j.ejca.2021.05.025. Epub 2021 Jun 29.
• Lin NU, Borges V, Anders C, Murthy RK, Paplomata E, Hamilton E, Hurvitz S, Loi S, Okines A, Abramson V, Bedard PL, Oliveira M, Mueller V, Zelnak A, DiGiovanna MP, Bachelot T, Chien AJ, O'Regan R, Wardley A, Conlin A, Cameron D, Carey L, Curigliano G, Gelmon K, Loibl S, Mayor J, McGoldrick S, An X, Winer EP. Intracranial Efficacy and Survival With Tucatinib Plus Trastuzumab and Capecitabine for Previously Treated HER2-Positive Breast Cancer With Brain Metastases in the HER2CLIMB Trial. J Clin Oncol. 2020 Aug 10;38(23):2610-2619. doi: 10.1200/JCO.20.00775. Epub 2020 May 29.
• Murthy RK, Loi S, Okines A, Paplomata E, Hamilton E, Hurvitz SA, Lin NU, Borges V, Abramson V, Anders C, Bedard PL, Oliveira M, Jakobsen E, Bachelot T, Shachar SS, Muller V, Braga S, Duhoux FP, Greil R, Cameron D, Carey LA, Curigliano G, Gelmon K, Hortobagyi G, Krop I, Loibl S, Pegram M, Slamon D, Palanca-Wessels MC, Walker L, Feng W, Winer EP. Tucatinib, Trastuzumab, and Capecitabine for HER2-Positive Metastatic Breast Cancer. N Engl J Med. 2020 Feb 13;382(7):597-609. doi: 10.1056/NEJMoa1914609. Epub 2019 Dec 11.
• Murthy R, Borges VF, Conlin A, Chaves J, Chamberlain M, Gray T, Vo A, Hamilton E. Tucatinib with capecitabine and trastuzumab in advanced HER2-positive metastatic breast cancer with and without brain metastases: a non-randomised, open-label, phase 1b study. Lancet Oncol. 2018 Jul;19(7):880-888. doi: 10.1016/S1470-2045(18)30256-0. Epub 2018 May 24.

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